Operational Test of the Potable Water-Distribution System (with the APU)

TASK 38-12-00-710-001-A
Operational Test of the Potable Water-Distribution System (with the APU)

NOTE: Only the operational test of the potable water-distribution system in a lavatory/galley is given. The procedure is applicable to all the other lavatories/galleys.

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TASK 12-15-38-613-001-A	Fill the Potable Water Tank System (Aircraft Electrical Power Available)
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)

3. Job Set-up
Subtask 38-12-00-861-055-A

A. Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).

Subtask 38-12-00-865-050-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
2000VU	WATER SYSTEM-QANT-IND	1MA	B01
** ON A/C NOT FOR ALL
2001VU	WATER SYS-QUANT-IND	1MA	B06

Subtask 38-12-00-010-054-A

C. Make sure that the potable water shutoff valve in the lavatory/galley is open.

Subtask 38-12-00-613-050-A

D. Fill the potable water system (Ref. AMM TASK 12-15-38-613-001).

4. Procedure
Subtask 38-12-00-710-051-A

A. Do this test

ACTION	RESULT
1.In the lavatory/galley operate the water faucet.	In the lavatory/galley water flows from the water faucet.

5. Close-up
Subtask 38-12-00-410-054-A

A. Make sure that the work area is clean and clear of tools and other items.

Subtask 38-12-00-862-055-A

B. De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.01 01:18:03 UTC